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cxl/core: Check existence of cxl_memdev_state in poison test

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Before now, all CXL memdevs were assumed to have a mailbox-backed
cxl_memdev_state, so poison command checks could safely dereference
the @mds.

With the introduction of Type 2 devices, a memdev may not implement
a mailbox interface, and so there is no associated cxl_memdev_state.
Guard against this case by returning false when @mds is absent.

Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alejandro Lucero <alucerop@amd.com>
Link: https://patch.msgid.link/20260331005047.2813980-1-alison.schofield@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Alison Schofield
2026-03-30 17:50:45 -07:00
committed by Dave Jiang
parent 7974835aa9
commit 261a02b93d
1 changed files with 3 additions and 0 deletions
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3
drivers/cxl/core/memdev.c
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@@ -204,6 +204,9 @@ bool cxl_memdev_has_poison_cmd(struct cxl_memdev *cxlmd,
{
struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
if (!mds)
return 0;
return test_bit(cmd, mds->poison.enabled_cmds);
}